KAR Laboratories Offers
Testing For Water, Groundwater, and Soil
1,4-Dioxane is a common
solvent and stabilizer for certain chlorinated solvents such as TCA. It is often
simply called "Dioxane" because the other two isomers 1,2- and 1,3-
are rarely encountered. Chemically an ether, this carcinogenic
chemical can be challenging to correctly analyze at lower levels.
Typically popular laboratory techniques such as Purge&Trap-Gas
Chromatography-Mass Spectroscopy result in inefficient purge
recovery because Henry's Law constant greatly favors Dioxane in the
aqueous (liquid) phase over the gaseous phase. Another factor working
against low-level detection is Dioxane's relatively high boiling
point for an organic solvent, roughly the same as water. Most
laboratories will struggle to document a valid reporting level of
100-250 ug/L (parts per billion or ppb) in water. KAR Laboratories can
achieve a reporting limit of 50 ug/L by optimization of the
There is no Federal Drinking Water
Maximum Contaminant Level (MCL) set for Dioxane. A draft MDEQ drinking water criterion
is 7.2 ug/L. To protect human health, a lower level of
detection is needed.
KAR Laboratories uses a method
called Elevated Temperature Purge&Trap-Gas Chromatography-Selective
Ion Monitoring Mass
Spectroscopy. This technique can routinely achieve sub-ppb method
detection limits with a reporting level of 1 ug/L in water and 50 ug/kg
in soil. KAR has reported several hundred samples in the past
few years and has detected alarming concentrations; several dozen
samples found to be in the 1000-2000 ug/L range.
The cost for the test is $150/sample which includes the sample
containers. Please contact one
of our project managers for more details or to order bottles.